by Mark B. Dromgool, KTA-Tator Australia Pty Ltd In a world where electronic communications and power transmission is expected to exist uninterrupted, the reliability of the necessary towers — many constructed of bolted, lattice-type carbon steel, usually hot-dip galvanized (HDG) — is often taken for granted. How can facility owners of elevated lattice structures lengthen the life of these structures, lower the risk of section loss or diminished structural functionality and concurrently lower the service cost per year? This article outlines some of the measures that have been employed by several leading Australian asset owners who are responsible for a portfolio of vulnerable structures in severe marine environments.
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by Jeff O’Dell, Wayne McGaulley and Evan Parson, Vision Point Systems, Inc.; and John Wegand, Paul Slebodnick and Jimmy Tagert, U.S. Naval Research Laboratory This article reports on a study conducted to investigate a proposed alternative to the SSPC-PA 2 method, that of rapid scanning procedures to measure DFT using handheld electronic devices, and to verify whether any losses in precision, and thus fidelity, of the data resulted from the use of the new scanning method. Findings from the Naval Research Laboratory were used to develop recommendations for the use of DFT scanning probe technology in the field.
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